Method for transmitting uplink control information of terminal in wireless communication system and terminal using method

ABSTRACT

A method for transmitting uplink control information of a terminal in a wireless communication system and a terminal using the method are provided. The method generates uplink control information, transmits the uplink control information to a base station using a specific PUCCH format among a plurality of physical uplink control channel (PUCCH) formats, wherein the specific PUCCH format which is used is determined on the basis of the number of symbols in the time domain used for transmission of uplink control information and the number of bits of the uplink control information.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a National Stage application under 35 U.S.C. § 371of International Application No. PCT/KR2018/010538, filed on Sep. 10,2018, which claims the benefit of U.S. Provisional Application No.62/556,501, filed on Sep. 10, 2017. The disclosures of the priorapplications are incorporated by reference in their entirety.

BACKGROUND OF THE DISCLOSURE Field of the Disclosure

The present disclosure relates to wireless communication and, moreparticularly, to a method for transmitting uplink control information bya user equipment in a wireless communication system and a device usingthe method.

Related Art

As communication devices have increasingly required greatercommunication capacity, the necessity for improved mobile broadbandcommunication, relative to an existing radio access technology (RAT),has emerged. Also, massive machine type communications (MTC), whichprovides many different services by connecting multiple devices andobjects, is also one of the major issues to be considered in nextgeneration communications.

A communication system considering services or terminals vulnerable toreliability or latency has also been discussed, and a next-generationRAT considering improved mobile broadband communication, massive MTC,ultra-reliable and low latency communication (URLLC), and the like, mayalso be termed a new RAT or new radio (NR).

In NR, a method for supporting orthogonal frequency divisionmultiplexing (OFDM) allowing different numerologies according to variousservices is being considered. In other words, NR systems may consider tosupport an OFDM scheme (or multiple access scheme) allowing independentnumerologies for the respective time and frequency resource regions.

Also, flexibility for supporting various services is considered to be animportant design factor in NR systems. For example, when scheduling isperformed in units of slots, NR systems may support a structure whichallows an arbitrary slot to be changed dynamically to a physicaldownlink shared channel (PDSCH) (namely a physical channel transmittingdownlink data) transmission slot (hereinafter, a DL slot) or a physicaluplink shared channel (PUSCH) (namely a physical channel transmittinguplink data). This feature may be said to as support dynamic DL/ULconfigurations.

As described above, the NR system provides much greater flexibility thanthe legacy long term evolution (LTE) system. As a result, the payloadsize of control information transmitted by a user equipment to theuplink and resources required for the uplink transmission may varyconsiderably. Therefore, it is not desirable to apply the uplink controlchannel format used in the LTE system in the same way to the NR, but itis necessary to define a specific format for the uplink control channelin the NR by taking into account the feature described above.

SUMMARY OF THE DISCLOSURE

A technical object of the present disclosure is to provide a method fortransmitting uplink control information of a user equipment in awireless communication system and a device using the method.

In one aspect, provided is a method for transmitting uplink controlinformation by a User Equipment (UE) in a wireless communication system.The method includes generating the uplink control information andtransmitting the uplink control information to a gNB by using a specificphysical uplink control channel (PUCCH) format among a plurality ofPUCCH formats. The specific PUCCH format used is determined based on thenumber of symbols of the time domain used for transmission of the uplinkcontrol information and the number of bits of the uplink controlinformation, and the plurality of PUCCH formats include PUCCH format 0used when the number of symbols of the time domain used for transmissionof the uplink control information is 1 or 2, and the number of bits ofthe uplink control information is 1 or 2, PUCCH format 1 used when thenumber of symbols of the time domain used for transmission of the uplinkcontrol information is 4 or more, and the number of bits of the uplinkcontrol information is 1 or 2, PUCCH format 2 used when the number ofsymbols of the time domain used for transmission of the uplink controlinformation is 1 or 2, and the number of bits of the uplink controlinformation is larger than 2 and PUCCH format 3 or 4 used when thenumber of symbols of the time domain used for transmission of the uplinkcontrol information is 4 or more, and the number of bits of the uplinkcontrol information is larger than 2.

The specific PUCCH format may be transmitted by using a PUCCH resourceindicated through downlink control information (DCI) among a pluralityof PUCCH resources.

The plurality of PUCCH resources may be configured through a radioresource control (RRC) signal.

Each of the plurality of PUCCH resources may include at least one of aparameter related to a first symbol to which a PUCCH is transmitted, aparameter related to a first physical resource block (PRB) to which aPUCCH is transmitted, a parameter related to the number of symbols towhich a PUCCH is transmitted, a parameter related to an orthogonal covercode (OCC), and a parameter related to cyclic shift (CS).

The method may further comprise receiving data from the gNB.

The uplink control information may includeacknowledge/negative-acknowledgement (ACK/NACK) for the data.

The specific PUCCH format may be transmitted within a slot including 14symbols in the time domain.

The PUCCH format 3 may not support multiplexing with PUCCH formatstransmitted by other UEs.

The PUCCH format 4 may support multiplexing with PUCCH formatstransmitted by other UEs.

In another aspect, provided is a user equipment (UE). The UE includes atransceiver transmitting and receiving radio signals and a processoroperating in conjunction with the transceiver. The processor isconfigured to generate the uplink control information and transmit theuplink control information to a gNB by using a specific physical uplinkcontrol channel (PUCCH) format among a plurality of PUCCH formats. Thespecific PUCCH format used is determined based on the number of symbolsof the time domain used for transmission of the uplink controlinformation and the number of bits of the uplink control information,and the plurality of PUCCH formats include PUCCH format 0 used when thenumber of symbols of the time domain used for transmission of the uplinkcontrol information is 1 or 2, and the number of bits of the uplinkcontrol information is 1 or 2, PUCCH format 1 used when the number ofsymbols of the time domain used for transmission of the uplink controlinformation is 4 or more, and the number of bits of the uplink controlinformation is 1 or 2, PUCCH format 2 used when the number of symbols ofthe time domain used for transmission of the uplink control informationis 1 or 2, and the number of bits of the uplink control information islarger than 2, and PUCCH format 3 or 4 used when the number of symbolsof the time domain used for transmission of the uplink controlinformation is 4 or more, and the number of bits of the uplink controlinformation is larger than 2.

The present disclosure uses a suitable, specific format among aplurality of uplink control channel formats according to the payloadsize of control information transmitted to the uplink by a userequipment and resources required for the uplink transmission. Therefore,the present disclosure may reduce waste of resources. Also, the presentdisclosure provides specific examples of the plurality of uplink controlchannels formats, thereby facilitating NR implementation.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a conventional wireless communication system.

FIG. 2 is a diagram showing a radio protocol architecture for a userplane.

FIG. 3 is a diagram showing a radio protocol architecture for a controlplane.

FIG. 4 illustrates a system structure of a next generation radio accessnetwork (NG-RAN) to which NR is applied.

FIG. 5 illustrates a frame structure that may be applied in NR.

FIG. 6 illustrates CORESET.

FIG. 7 is a diagram illustrating a difference between a related artcontrol region and the CORESET in NR.

FIG. 8 illustrates one example of a frame structure which may be used inNR.

FIG. 9 illustrates a hybrid beamforming structure from the perspectivesof TXRUs and physical antennas.

FIG. 10 illustrates the beam sweeping operation for a synchronizationsignal and system information during a DL transmission process.

FIG. 11 illustrates a method for transmitting uplink control informationby a UE according to one embodiment of the present disclosure.

FIG. 12 illustrates a specific example applying a method fortransmitting uplink control information by a UE.

FIG. 13 illustrates parameters configured for a UE by a base station.

FIG. 14 illustrates a block diagram of a device in which an embodimentof the present disclosure is implemented.

FIG. 15 illustrates a UE of FIG. 14 in more detail.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

FIG. 1 shows a conventional wireless communication system. The wirelesscommunication system may be referred to as an Evolved-UMTS TerrestrialRadio Access Network (E-UTRAN) or a Long Term Evolution (LTE)/LTE-Asystem, for example.

The E-UTRAN includes at least one base station (BS) 20 which provides acontrol plane and a user plane to a user equipment (UE) 10. The UE 10may be fixed or mobile, and may be referred to as another terminology,such as a mobile station (MS), a user terminal (UT), a subscriberstation (SS), a mobile terminal (MT), a wireless device, etc. The BS 20is generally a fixed station that communicates with the UE 10 and may bereferred to as another terminology, such as an evolved node-B (eNB), abase transceiver system (BTS), an access point, etc.

The BSs 20 are interconnected by means of an X2 interface. The BSs 20are also connected by means of an S1 interface to an evolved packet core(EPC) 30, more specifically, to a mobility management entity (MME)through S1-MME and to a serving gateway (S-GW) through S1-U.

The EPC 30 includes an MME, an S-GW, and a packet data network-gateway(P-GW). The MME has access information of the UE or capabilityinformation of the UE, and such information is generally used formobility management of the UE. The S-GW is a gateway having an E-UTRANas an end point. The P-GW is a gateway having a PDN as an end point.

Layers of a radio interface protocol between the UE and the network canbe classified into a first layer (L1), a second layer (L2), and a thirdlayer (L3) based on the lower three layers of the open systeminterconnection (OSI) model that is well-known in the communicationsystem. Among them, a physical (PHY) layer belonging to the first layerprovides an information transfer service by using a physical channel,and a radio resource control (RRC) layer belonging to the third layerserves to control a radio resource between the UE and the network. Forthis, the RRC layer exchanges an RRC message between the UE and the BS.

FIG. 2 is a diagram showing a radio protocol architecture for a userplane. FIG. 3 is a diagram showing a radio protocol architecture for acontrol plane. The user plane is a protocol stack for user datatransmission. The control plane is a protocol stack for control signaltransmission.

Referring to FIGS. 2 and 3, a PHY layer provides an upper layer with aninformation transfer service through a physical channel. The PHY layeris connected to a medium access control (MAC) layer which is an upperlayer of the PHY layer through a transport channel. Data is transferredbetween the MAC layer and the PHY layer through the transport channel.The transport channel is classified according to how and with whatcharacteristics data is transferred through a radio interface.

Data is moved between different PHY layers, that is, the PHY layers of atransmitter and a receiver, through a physical channel. The physicalchannel may be modulated according to an Orthogonal Frequency DivisionMultiplexing (OFDM) scheme, and use the time and frequency as radioresources.

The functions of the MAC layer include mapping between a logical channeland a transport channel and multiplexing and demultiplexing to atransport block that is provided through a physical channel on thetransport channel of a MAC Service Data Unit (SDU) that belongs to alogical channel. The MAC layer provides service to a Radio Link Control(RLC) layer through the logical channel.

The functions of the RLC layer include the concatenation, segmentation,and reassembly of an RLC SDU. In order to guarantee various types ofQuality of Service (QoS) required by a Radio Bearer (RB), the RLC layerprovides three types of operation mode: Transparent Mode (TM),Unacknowledged Mode (UM), and Acknowledged Mode (AM). AM RLC provideserror correction through an Automatic Repeat Request (ARQ).

The RRC layer is defined only on the control plane. The RRC layer isrelated to the configuration, reconfiguration, and release of radiobearers, and is responsible for control of logical channels, transportchannels, and PHY channels. An RB means a logical route that is providedby the first layer (PHY layer) and the second layers (MAC layer, the RLClayer, and the PDCP layer) in order to transfer data between UE and anetwork.

The function of a Packet Data Convergence Protocol (PDCP) layer on theuser plane includes the transfer of user data and header compression andciphering. The function of the PDCP layer on the user plane furtherincludes the transfer and encryption/integrity protection of controlplane data.

What an RB is configured means a process of defining the characteristicsof a wireless protocol layer and channels in order to provide specificservice and configuring each detailed parameter and operating method. AnRB can be divided into two types of a Signaling RB (SRB) and a Data RB(DRB). The SRB is used as a passage through which an RRC message istransmitted on the control plane, and the DRB is used as a passagethrough which user data is transmitted on the user plane.

If RRC connection is established between the RRC layer of UE and the RRClayer of an E-UTRAN, the UE is in the RRC connected state. If not, theUE is in the RRC idle state.

A downlink transport channel through which data is transmitted from anetwork to UE includes a broadcast channel (BCH) through which systeminformation is transmitted and a downlink shared channel (SCH) throughwhich user traffic or control messages are transmitted. Traffic or acontrol message for downlink multicast or broadcast service may betransmitted through the downlink SCH, or may be transmitted through anadditional downlink multicast channel (MCH). Meanwhile, an uplinktransport channel through which data is transmitted from UE to a networkincludes a random access channel (RACH) through which an initial controlmessage is transmitted and an uplink shared channel (SCH) through whichuser traffic or control messages are transmitted.

Logical channels that are placed over the transport channel and that aremapped to the transport channel include a broadcast control channel(BCCH), a paging control channel (PCCH), a common control channel(CCCH), a multicast control channel (MCCH), and a multicast trafficchannel (MTCH).

The physical channel includes several OFDM symbols in the time domainand several subcarriers in the frequency domain. One subframe includes aplurality of OFDM symbols in the time domain. An RB is a resourcesallocation unit, and includes a plurality of OFDM symbols and aplurality of subcarriers. Furthermore, each subframe may use specificsubcarriers of specific OFDM symbols (e.g., the first OFDM symbol) ofthe corresponding subframe for a physical downlink control channel(PDCCH), that is, an L1/L2 control channel. A Transmission Time Interval(TTI) is a unit time for subframe transmission.

Hereinafter, a new radio access technology (new RAT) or new radio (NR)will be described.

As communication devices have increasingly required greatercommunication capacity, the necessity for improved mobile broadbandcommunication, relative to an existing radio access technology (RAT),has emerged. Also, massive machine type communications (MTC), whichprovides many different services by connecting multiple devices andobjects, is also one of the major issues to be considered in nextgeneration communications. In addition, a communication system designconsidering services or terminals vulnerable to reliability or latencyhas also been discussed. An introduction of a next-generation RATconsidering enhanced mobile broadband communication, massive MTC,ultra-reliable and low latency communication (URLLC), and the like, hasbeen discussed, and in this disclosure, for the purposes of description,the corresponding technology will be termed new RAT or new radio (NR).

FIG. 4 illustrates a system structure of a next generation radio accessnetwork (NG-RAN) to which NR is applied.

Referring to FIG. 4, the NG-RAN may include a gNB and/or an eNB thatprovides user plane and control plane protocol termination to aterminal. FIG. 4 illustrates the case of including only gNBs. The gNBand the eNB are connected by an Xn interface. The gNB and the eNB areconnected to a 5G core network (5GC) via an NG interface. Morespecifically, the gNB and the eNB are connected to an access andmobility management function (AMF) via an NG-C interface and connectedto a user plane function (UPF) via an NG-U interface.

The gNB may provide functions such as an inter-cell radio resourcemanagement (Inter Cell RRM), radio bearer management (RB control),connection mobility control, radio admission control, measurementconfiguration & provision, dynamic resource allocation, and the like.The AMF may provide functions such as NAS security, idle state mobilityhandling, and so on. The UPF may provide functions such as mobilityanchoring, PDU processing, and the like.

FIG. 5 illustrates a frame structure that may be applied in NR.

Referring to FIG. 5, a frame may be composed of 10 milliseconds (ms) andinclude 10 subframes each composed of 1 ms.

One or a plurality of slots may be included in a subframe according tosubcarrier spacings.

The following table illustrates a subcarrier spacing configuration μ.

TABLE 1 μ Δf = 2^(μ) · 15 [kHz] Cyclic prefix 0 15 Normal 1 30 Normal 260 Normal Extended 3 120 Extended 4 240 normal

The following table illustrates the number of slots in a frame(N^(frame,μ) _(slot)), the number of slots in a subframe N^(subframe,μ)_(slot)), the number of symbols in a slot (N^(slot) _(symb)), and thelike, according to subcarrier spacing configurations μ.

TABLE 2 μ N_(slot) ^(symb) N_(slot) ^(frame, u) N_(slot) ^(subframe, u)0 14 10 1 1 14 20 2 2 14 40 4 3 14 80 8 4 14 160 16

In FIG. 5, μ=0, 1, 2 is illustrated.

A physical downlink control channel (PDCCH) may include one or morecontrol channel elements (CCEs) as illustrated in the following table.

TABLE 3 Aggregation level Number of CCEs 1 1 2 2 4 4 8 8 16 16

That is, the PDCCH may be transmitted through a resource including 1, 2,4, 8, or 16 CCEs. Here, the CCE includes six resource element groups(REGs), and one REG includes one resource block in a frequency domainand one orthogonal frequency division multiplexing (OFDM) symbol in atime domain.

Meanwhile, in a future wireless communication system, a new unit calleda control resource set (CORESET) may be introduced. The terminal mayreceive the PDCCH in the CORESET.

FIG. 6 illustrates CORESET.

Referring to FIG. 6, the CORESET includes N^(CORESET) _(RB) number ofresource blocks in the frequency domain, and N^(CORESET) _(symb) ∈{1, 2,3} number of symbols in the time domain. N^(CORESET) _(RB) andN^(CORESET) _(symb) may be provided by a base station via higher layersignaling. As illustrated in FIG. 6, a plurality of CCEs (or REGs) maybe included in the CORESET.

The UE may attempt to detect a PDCCH in units of 1, 2, 4, 8, or 16 CCEsin the CORESET. One or a plurality of CCEs in which PDCCH detection maybe attempted may be referred to as PDCCH candidates.

A plurality of CORESETs may be configured for the terminal.

FIG. 7 is a diagram illustrating a difference between a related artcontrol region and the CORESET in NR.

Referring to FIG. 7, a control region 300 in the related art wirelesscommunication system (e.g., LTE/LTE-A) is configured over the entiresystem band used by a base station (BS). All the terminals, excludingsome (e.g., eMTC/NB-IoT terminal) supporting only a narrow band, must beable to receive wireless signals of the entire system band of the BS inorder to properly receive/decode control information transmitted by theBS.

In contrast, the future wireless communication system introduces theCORESET described above. CORESETs 301, 302, and 303 are radio resourcesfor control information to be received by the terminal and may use onlya portion, rather than the entirety of the system bandwidth. The BS mayallocate the CORESET to each UE and may transmit control informationthrough the allocated CORESET. For example, in FIG. 7, a first CORESET301 may be allocated to UE 1, a second CORESET 302 may be allocated toUE 2, and a third CORESET 303 may be allocated to UE 3. In the NR, theterminal may receive control information from the BS, withoutnecessarily receiving the entire system band.

The CORESET may include a UE-specific CORESET for transmittingUE-specific control information and a common CORESET for transmittingcontrol information common to all UEs.

Meanwhile, in NR, high reliability may be required depending onapplication fields, and with this requirement, a target block error rate(BLER) for downlink control information (DCI) transmitted through adownlink control channel (for example, physical downlink control channel(PDCCH)) may be significantly lower than that in the legacy technology.In one example of a method for satisfying the requirement for highreliability, the amount of contents included in the DCI may be reducedand/or the amount of resources used for DCI transmission may beincreased. At this time, the resources may include at least one ofresources in the time domain, frequency domain, code domain, or spatialdomain.

In NR, the following techniques/features may be applied.

<Self-Contained Subframe Structure>

FIG. 8 illustrates one example of a frame structure which may be used inNR.

As shown in FIG. 8, for the purpose of minimizing latency, NR considersa structure in which a control and data channels are time divisionmultiplexed (TDMed) within one TTI as one of frame structures.

In FIG. 8, the hatched region represents a downlink control region whilethe region in black color represents an uplink control region. Theregion without any indication may be used for downlink (DL) datatransmission or used for uplink (UL) data transmission. A characterizingfeature of such a structure is that DL transmission and UL transmissionare performed sequentially to transmit DL data and to receive ULACK/NACK within a subframe. As a result, the time required to retransmitdata at the occurrence of a data transmission error may be reduced, andthereby the latency of final data transmission may be minimized.

In the self-contained subframe structure as described above, a time gapfor a gNB and a UE to switch from the transmission mode to the receptionmode or vice versa may be needed. To this purpose, in the self-containedsubframe structure, part of OFDM symbols at the time of switching fromDL to UL transmission may be configured as a guard period (GP).

<Analog Beamforming #1>

Radio waves in the millimeter wave (MMW) band have short wavelengths,which makes a plurality of antenna elements possible on the same area.In other words, in the 30 GHz band, the corresponding wavelength is 1cm, and a total of 64 (8×8) antenna elements may be installed in a twodimensional array form on a panel of 4 by 4 cm with spacing of 0.5lambda (wavelength). Therefore, in the mmW band, a plurality of antennaelements may be used to improve the beamforming (BF) gain, therebyextending coverage or increasing throughput.

In this case, if a transceiver unit (TXRU) is used to allow adjustmentof transmission power and phase for each antenna element, independentbeamforming may be realized for each frequency resource. However,installing TXRUs in all of one hundred or more antenna elements raisesan effectiveness issue in terms of costs. Therefore, a method formapping a plurality of antenna elements to one TXRU and adjusting a beamdirection by using an analog phase shifter is being considered. Thiskind of analog beamforming method has a disadvantage that frequencyselective beamforming is not possible because only one beam directionmay be implemented over the whole band.

As an intermediate solution between digital beamforming (BF) and analogBF, hybrid BF employing B TXRUs, the number of which is smaller than thenumber of antenna elements, Q, may be taken into consideration. In thiscase, in spite of variations due to how B TXRUs are connected to Qantenna elements, the number of beam directions for simultaneoustransmission is limited below B.

<Analog Beamforming #2>

In NR, when a plurality of antennas are used, a hybrid beamformingtechnique that combines digital beamforming and analog beamforming maybe used.

At this time, analog beamforming (or RF beamforming) refers to theoperation performing precoding (or combining) at the RF stage. In thehybrid beamforming, the baseband and RF blocks each perform precoding(or combining), thereby achieving performance comparable to that ofdigital beamforming while reducing the number of RF chains and D/A (orA/D) converters.

FIG. 9 illustrates a hybrid beamforming structure from the perspectivesof TXRUs and physical antennas.

The hybrid beamforming structure may be represented by N transceiverunits (TXRUs) and M physical antennas. Then digital beamforming for Ldata layers to be transmitted from the transmission block may beexpressed by an N-by-L matrix, and the N transformed digital signals areconverted to analog signals through the TXRUs, for which analogbeamforming expressed by an M-by-N matrix is applied.

In NR systems, a gNB is designed to change analog beamforming in unitsof symbols so that more efficient beamforming is supported for a UElocated in a specific area. Furthermore, if N specific TXRUs and M RFantennas are defined as one antenna panel in FIG. 9, the NR system evenconsiders to introduce a plurality of antenna panels to which hybridbeamforming may be applied independently.

As described above, if a gNB uses a plurality of analog beams, analogbeams suitable for signal reception may be different for the respectiveUEs. Therefore, a beam sweeping operation is being considered, whichconverts, for each symbol, a plurality of analog beams to be applied bythe gNB at a specific subframe (SF) at least for a synchronizationsignal, system information, or paging so that every UE may have areception opportunity.

FIG. 10 illustrates the beam sweeping operation for a synchronizationsignal and system information during a DL transmission process.

In FIG. 10, a physical resource (or physical channel) to which systeminformation of the NR system is transmitted according to a broadcastingscheme is referred to as a physical broadcast channel (xPBCH). At thistime, analog beams belonging to different antenna panels within onesymbol may be transmitted simultaneously, and to measure a channel foreach analog beam, a method for adopting a beam reference signal (BRS) isunder consideration, which is a reference signal (RS) transmitted byapplying a single analog beam (corresponding to a specific antennapanel) as shown in FIG. 10. The BRS may be defined for a plurality ofantenna ports, and each antenna port of the BRS may correspond to asingle analog beam. At this time, different from the BRS, asynchronization signal or xPBCH may be transmitted by applying all ofthe analog beams within an analog beam group so as to be receivedproperly by an arbitrary UE.

[Radio Resource Management (RRM) Measurement in the LTE]

The LTE system supports an RRM operation which includes power control,scheduling, cell search, cell reselection, handover, radio link orconnection monitoring, and connection establish/re-establish. At thistime, a serving cell may request RRM measurement information, which is ameasurement value needed to perform the RRM operation, from a UE;typically, in the LTE system, a UE may measure and report cell searchinformation for each cell, reference signal received power (RSRP), orreference signal received quality (RSRQ).

More specifically, in the LTE system, a UE receives ‘measConfig’ as anupper layer signal for RRM measurement from a serving cell. The UEmeasures RSRP or RSRQ according to the information of the ‘measConfig’.Definitions of the RSRP and RSRP are given as follows.

RSRP may be defined as a linear average of power contributions ofresource elements carrying cell-specific reference signals within ameasurement frequency band under consideration.

RSRQ may be defined as NxRSRP/(E-UTRA carrier RSSI). Here, N is thenumber of resource blocks of the E-UTRA carrier RSSI measurement band.

RSSI refers to received broadband power including thermal noise andwhite noise within a measurement band.

According to the definition, a UE operating in the LTE system may beallowed to measure RSRP over measurement bandwidth corresponding to oneof 6, 15, 25, 50, 75, 100 resource blocks (RBs) through informationelement (IE) related to allowed measurement bandwidth transmitted fromsystem information block type 3 (SIB3) in the case of intra-frequencymeasurement or through allowed measurement bandwidth transmitted fromSIBS in the case of inter-frequency measurement; or, in the absence ofthe IE, the UE may measure the RSRP over the whole downlink (DL) systemfrequency bandwidth by default.

At this time, if the UE receives allowed measurement bandwidth, the UEconsiders the corresponding value to be the maximum measurementbandwidth and may freely measure the RSRP value within the correspondingvalue. However, if a serving cell transmits IE defined as wideband-RSRQand sets the allowed measurement bandwidth to be larger than 50 RBs, theUE has to calculate the RSRP value with respect to the whole allowedmeasurement bandwidth. Meanwhile, depending on the definition of theRSSI bandwidth, RSSI is measured over the frequency bandwidth allowedfor a receiver of the UE.

In what follows, the present disclosure will be described.

In the present disclosure, in a wireless communication system comprisinggNBs and UEs, any arbitrary slot (or subframe) may be configureddynamically to be used for downlink (DL) or uplink (UL) transmission. Inthis case, a method for allocating a physical uplink control channel(PUCCH) resource including at least one of a slot to which a PUCCHcarrying at least one information such as HARQ-ACK and channel stateinformation (CSI) is to be transmitted, transmission starting time(=starting symbol), transmission duration, resource block (RB) to beused for transmission, orthogonal cover code (OCC), and cyclic shift(CS) will be proposed.

Recently, 3GPP standards organizations are considering to use a networkslicing method which implements a plurality of logical networks on asingle physical network in the new radio (NR) system, which is the 5Gwireless communication system.

The logical network has to support services having various requirements(for example, enhanced Mobile Broadband (eMBB), Ultra Reliable LowLatency Communication (URLLC), and massive Machine Type Communications(mMTC)). Also, a method for supporting the orthogonal frequency divisionmultiplexing (OFDM) scheme which allows different numerologies accordingto the various services is considered for the physical layer system ofthe NR system. In other words, the NR system considers an OFDM scheme(or multiple access scheme) allowing independent numerologies for therespective time and frequency resource regions.

Also, flexibility for supporting various services is considered to be animportant design factor in NR systems. When a slot is defined as ascheduling unit, the NR system intends to support a structure in whichan arbitrary slot may be dynamically converted to a PDSCH (namely, aphysical channel transmitting downlink data) transmission slot (in whatfollows, DL slot) or to a PUSCH (namely, a physical channel transmittinguplink data) transmission slot (in what follows, UL slot). In whatfollows, the structure may be referred to as a dynamic DL/ULconfiguration or dynamic time division duplex (TDD).

When NR system supports the dynamic DL/UL configuration, a physicalchannel PUCCH which transmits UL control information such as HARQ-ACKinformation about a PDSCH scheduled over a DL slot and/or CSI may betransmitted from a region allowed for UL transmission.

A gNB may instruct a UE to perform PUCCH transmission through downlinkcontrol information (DCI). At this time, a slot to which the PUCCH is tobe transmitted, a starting symbol corresponding to the time at whichtransmission is started within the slot, and transmission duration whichindicates how many symbols the slot is transmitted through may beinformed. Also, to support a multiplexing scheme by which a plurality ofUEs transmit the PUCCH through the same frequency resource within asymbol, PUCCH resources may be allocated and indicated by defining anacknowledge resource indicator (ARI) set which combines a code resourcesuch as orthogonal cover code (OCC) and cyclic shift (CS) with afrequency resource.

In the present disclosure, DL assignment may refer to DCI indicatingPDSCH scheduling, and UL grant may refer to DCI indicating PUSCHscheduling. A short PUCCH may refer to a PUCCH having 1-symbol or2-symbol transmission duration, and a long PUCCH may refer to a PUCCHhaving transmission duration ranging from 4-symbol to 14-symbol. An ARIPUCCH resource may refer to a PUCCH resource to which uplink controlinformation including HARQ-ACK and CSI may be transmitted, and a CSIPUCCH resource or SR PUCCH resource may refer to an individual PUCCHresource for transmitting CSI and SR, respectively. A multi-beam PRACHmay refer to a case in which the direction of a PRACH transmission beamor a PRACH reception beam of a gNB is not fixed but changing.

If it is difficult to satisfy target coverage by using a long PUCCHtransmitted from a single slot, one or more slots may transmit the longPUCCH repeatedly (namely, multi-slot long PUCCH transmission may beperformed). In addition to the resources that have to be allocated forsingle-slot long PUCCH transmission, additional information may berequired to perform the multi-slot long PUCCH transmission.

The number of UL symbols required to satisfy target coverage,transmission starting position and transmission duration of the longPUCCH in each single slot constituting a multi-slot may be indicated orconfigured.

Also, since a region allowed for UL transmission varies for each slotwhen dynamic DL/UL configuration is supported, multi-slot transmissionmay not be composed of contiguous slots. Therefore, together with thespacing between single-slots constituting the multi-slot, a frequencyhopping pattern between slots for obtaining a frequency diversity gainmay also be indicated or configured for the UE.

In what follows, the present disclosure proposes a method for indicatinga PUCCH format dynamically, a method for allocating and indicatingresources of a short PUCCH, and a method for allocating and indicatingresources for a PUCCH transmitted through one or more slots, namelymulti-TTI.

<Method for Adapting PUCCH Format Dynamically>

FIG. 11 illustrates a method for transmitting uplink control informationby a UE according to one embodiment of the present disclosure.

Referring to FIG. 11, a UE generates uplink control information S110 andtransmits the uplink control information to a gNB by using a specificphysical uplink control channel (PUCCH) format among a plurality ofPUCCH formats S111.

The specific PUCCH format may be determined based on the number ofsymbols in the time domain used for transmission of the uplink controlinformation and the number of bits (which may also be called the payloadsize) of the uplink control information.

For example, the PUCCH transmitting HARQ-ACK for a PDSCH scheduledthrough DL assignment may have the following PUCCH formats according tothe payload size and transmission duration (namely, the number of PUCCHtransmission symbols). In other words, examples of the plurality ofPUCCH formats are as follows.

(1) PUCCH format 0: A PUCCH having transmission duration of 1-symbol or2-symbol and transmitting UCI including 1 or 2 bits of HARQ-ACKinformation in the form of a sequence.

(2) PUCCH format 1: A PUCCH having transmission duration of 4-symbol ormore and transmitting UCI including 1 or 2 bits of HARQ-ACK informationby using a specific PRB resource. This PUCCH may be transmitted by beingmultiplexed with other UEs by using OCC and CS resources.

(3) PUCCH format 2: A PUCCH having transmission duration of 1-symbol or2-symbol and transmitting HARQ-ACK information exceeding 2 bits by FDMwith UCI and RS.

(4) PUCCH format 3: A PUCCH having transmission duration of 4-symbol ormore and transmitting HARQ-ACK information exceeding X bits (X≥2, forexample, X=40) by using a specific PRB(s). This PUCCH is transmittedwithout being multiplexed with other UEs.

(5) PUCCH format 4: A PUCCH having transmission duration of 4-symbol ormore and transmitting HARQ-ACK information exceeding 2 bits and lessthan or equal to X bits by using a specific PRB resource. This PUCCH maysupport multiplexing with other UEs.

The gNB may dynamically instruct a UE to transmit HARQ-ACK by using onePUCCH format among the PUCCH formats according to the HARQ-ACK payloadsize, extent of coverage, or latency requirement.

[Proposed method #1] The PUCCH format may be dynamically indicated in animplicit manner from the size of HARQ-ACK payload to be transmitted by aUE and transmission duration (the number of symbols) of the PUCCH withinDCI that instructs PUCCH transmission.

As one example, if the transmission duration of a PUCCH indicated byDCI, upper layer signal (for example, RRC signal), or a combination ofboth is 1-symbol or 2-symbol, it may be interpreted that thecorresponding PUCCH has indicated a short PUCCH format.

Therefore, if HARQ-ACK information to be transmitted is 1-bit or 2-bits,a short PUCCH is transmitted with transmission durationindicated/configured according to the PUCCH format 0; in the case of2-bits or more, the PUCCH may be transmitted according to the PUCCHformat 2.

In the same way, if the HARQ-ACK information is 1-bit or 2-bits, andtransmission duration of the PUCCH is indicated to be larger than4-symbol and smaller than 14-symbol, it may be interpreted that thePUCCH is transmitted according to the PUCCH format 1 while, in the casethat the HARQ-ACK information is more than 2-bits, it may be interpretedthat the PUCCH is transmitted according to the PUCCH format 3.

The [Proposed method #1] may be applied together with other proposedmethods of the present disclosure to the extent that the method #1 doesnot collide with the other methods.

FIG. 12 illustrates a specific example applying a method fortransmitting uplink control information by a UE.

Referring to FIG. 12, a gNB configures a plurality of PUCCH resourcesfor a UE through an upper layer signal (for example, an RRC signal)S121. At this time, each PUCCH resource may include a plurality ofparameters related to PUCCH transmission such as PUCCH transmissionstarting symbol (start timing) and a physical resource block (PRB) atwhich PUCCH transmission is started, and the PUCCH resource may beconfigured by a plurality of gNBs. Each of the plurality of PUCCHresources may also be said to include a parameter related to a firstsymbol to which a PUCCH is transmitted and a parameter related to afirst physical resource block (PRB) to which the PUCCH is transmitted.

The gNB transmits downlink control information (DCI) which indicates oneof the plurality of PUCCH resources S122.

The DCI may include a plurality of fields and may inform of an indicatedPUCCH resource through one field or two or more fields.

The gNB transmits a reference signal and data S123. The reference signalmay be a demodulation reference signal (DM-RS) or a channel stateinformation-reference signal (CSI-RS). The data may be scheduled by theDCI or scheduled by another DCI.

The UE generates uplink control information S124. For example, the UEmay generate HARQ-ACK (ACK/NACK) with respect to the data and channelsstate information that contains measurements of the reference signal.

The UE transmits the PUCCH format, which is determined based on thenumber of symbols in the time domain used for transmission of the uplinkcontrol information and the number of bits of the uplink controlinformation, by using a PUCCH resource indicated by the DCI S125. ThePUCCH format may be transmitted within a slot consisting of 14 symbolsin the time domain.

In what follows, how a gNB allocates resources for PUCCH transmission byusing an upper layer signal and DCI will be described in more detail.

<Method for Allocating Resources of a Short PUCCH in a Single Slot>

[Proposed method #2] For transmission of UCI including HARQ-ACKinformation of 1-bit or 2-bits, to allocate and indicate a short PUCCHresource consisting of 1-symbol, a gNB may transmit/configure thefollowing information to/for a UE through DCI and an upper layer signal(for example, an RRC signal) or a combination of both.

(1) PUCCH transmission slot timing (which may be called for short “slottiming”).

(2) PUCCH transmission starting (symbol) timing (which may be called forshort “start timing”).

(3) Indication of a PUCCH transmission resource (which may be called forshort “ARI value”).

It should be noted that the slot timing and start timing may be signaledseparately through individual fields within the DCI or jointly coded andsignaled through a single field. The ARI value may be signaled in a waythat a PUCCH resource set composed of a combination of PRB allocationinformation and a sequence corresponding to ACK or NACK is configured byan upper layer signal such as the RRC signal separately (for example,differently) for each UE, and one of the resource values is signaledthrough DCI.

As one example, the gNB may dynamically instruct a UE through a bitfield within DCI to transmit uplink control information such as HARQ-ACKto the PUCCH, and the UE may transmit the PUCCH to the gNB by using aspecific PUCCH resource in a slot indicated for PUCCH transmission.Here, the specific PUCCH resource may indicate a symbol to which thePUCCH is transmitted within the slot, frequency resource, and sequenceresource. The gNB may combine a specific PRB resource within a symboland a sequence corresponding to ACK or NACK to define an ARI value; anddefine an ARI set composed of a plurality of ARI values for eachindividual UE and preconfigure the ARI set for the UE through an upperlayer signal (for example, an RRC signal).

The PRB allocation may include information about how many PRBs to use(contiguously or incontiguously) to transmit a sequence among PRBs(available for PUCCH transmission) belonging to a symbol within a slot.If a slot to which a PUCCH is to be transmitted and a symbol to whichthe PUCCH is transmitted within the corresponding slot are jointly codedby a single field within DCI, the UE may interpret a slot index and atransmission starting symbol mapped to a value indicated by a methodagreed on beforehand with the gNB or a predefined look-up table.

The [Proposed method #2] may be applied together with other proposedmethods of the present disclosure to the extent that the method #2 doesnot collide with the other methods.

[Proposed method #3] For transmission of UCI including HARQ-ACKinformation of 1-bit or 2-bits, to allocate and indicate a short PUCCHresource consisting of 1-symbol, a gNB may transmit/configure thefollowing information to/for a UE through DCI and an upper layer signal(for example, an RRC signal) or a combination of both.

(1) PUCCH transmission slot timing (“slot timing”).

(2) PUCCH transmission starting (symbol) timing (“start timing”).

(3) Indication of a PUCCH transmission resource (“ARI value”).

It should be noted that the slot timing may be signaled by an individualfield within DCI, and a PUCCH resource composed of a combination of thestart timing, PRB allocation information, and a sequence correspondingto ACK or NACK may be jointly coded and signaled through a single ARIfield. To this purpose, first, a plurality of PUCCH resources composedof a combination of PUCCH start timing and a sequence may configure aPUCCH resource set corresponding to each ARI value in advance through anupper layer signal (for example, an RRC signal). In other words, a PUCCHresource set may include a plurality of PUCCH resources, and each PUCCHresource within the PUCCH resource set may correspond to each ARI value.Here, the PUCCH resource may be a combination of various parametersneeded for transmission of the PUCCH, like PUCCH start timing and acombination of sequences.

As one example, the gNB dynamically instructs a UE through a bit fieldwithin DCI to transmit uplink control information such as HARQ-ACK tothe PUCCH, and the UE transmits the PUCCH to the gNB by using a specificresource in a slot indicated for PUCCH transmission. Here, the specificPUCCH resource may indicate a combination of a plurality of parameterssuch as a symbol to which a PUCCH is transmitted within a slot, afrequency resource, a sequence resource. The gNB may combine starttiming at which PUCCH transmission is started, a specific PRB resourcewithin a symbol, and a sequence corresponding to ACK or NACK to definean ARI value; and define an ARI set composed of a plurality of ARIvalues for each individual UE and preconfigure the ARI set for the UEthrough an upper layer signal (for example, an RRC signal).

The PRB allocation may include information about how many PRBs to usecontiguously or incontiguously to transmit a sequence among PRBsavailable for PUCCH transmission belonging to a symbol within a slot. Ifa slot to which a PUCCH is to be transmitted and a symbol to which thePUCCH is transmitted within the corresponding slot are jointly coded bya single field within DCI, the UE may interpret a slot index and atransmission starting symbol mapped to a value indicated by a methodagreed on beforehand with the gNB or a predefined look-up table.

The [Proposed method #3] may be applied together with other proposedmethods of the present disclosure to the extent that the method #3 doesnot collide with the other methods.

When the [Proposed method #2 and #3] are put together in a table, theymay be summarized as shown in Table 4. Table 4 summarizes a method forallocating resources with respect to a short PUCCH which transmits UCIof up to 2 bits and which is composed of 1 symbol, namely, the proposedmethod #2 and #3.

TABLE 4 Starting symbol Slot position: A position: B ARI ProposedIndicated by Indicated PRB Both method #2 DCI by DCI allocation, A and Bcode/ may be sequence indicated index together Proposed Indicated byIncluded PRB method #3 DCI in ARI allocation, code/ sequence indexstarting symbol position

[Proposed method #4] To allocate and indicate a short PUCCH resourcecomposed of 1-symbol for transmission of UCI of 2 bits or more, a gNBmay transmit/configure the following information to/for a UE through DCIand an upper layer signal (for example, an RRC signal) or a combinationof both.

(4) PUCCH transmission slot timing (“slot timing”).

(5) PUCCH transmission starting (symbol) timing (“start timing”).

(6) Indication of a PUCCH transmission resource (“ARI value”).

It should be noted that the slot timing and start timing may be signaledseparately through individual fields within the DCI or jointly coded andsignaled through a single field. The ARI value may indicate PRBallocation information, and an ARI set composed of a plurality of ARIvalues may be configured by an upper layer signal such as the RRC signalseparately (for example, differently) for each UE, and one of the ARIvalues may be signaled through DCI.

As one example, the gNB may dynamically instruct a UE through a bitfield within DCI to transmit uplink control information such as HARQ-ACKto the PUCCH, and the UE may transmit the PUCCH to the gNB by using aspecific resource in a slot indicated for PUCCH transmission. Here, thespecific PUCCH resource may indicate a symbol to which the PUCCH istransmitted within the slot and a frequency resource. The gNB may definea specific PUCCH resource within a symbol to be mapped to one ARI valueand define an ARI set composed of a plurality of ARI values for eachindividual UE and preconfigure the ARI set for the UE through an upperlayer signal (for example, an RRC signal).

The PRB allocation may include information about how many PRBs to use(contiguously or incontiguously) to transmit a PUCCH among PRBs(available for PUCCH transmission) belonging to a symbol within a slot.If a slot to which a PUCCH is to be transmitted and a symbol to whichthe PUCCH is transmitted within the corresponding slot are jointly codedby a single field within DCI, the UE may interpret a slot index and atransmission starting symbol mapped to a value indicated by a methodagreed on beforehand with the gNB or a predefined look-up table.

The [Proposed method #4] may be applied together with other proposedmethods of the present disclosure to the extent that the method #4 doesnot collide with the other methods.

[Proposed method #5] To allocate and indicate a short PUCCH resourcecomposed of 1-symbol for transmission of UCI of 2 bits or more, a gNBmay transmit/configure the following information to/for a UE through DCIand an upper layer signal (for example, an RRC signal) or a combinationof both.

(4) PUCCH transmission slot timing (“slot timing”).

(5) PUCCH transmission starting (symbol) timing (“start timing”).

(6) Indication of a PUCCH transmission resource (“ARI value”).

It should be noted that the slot timing may be signaled through anindividual field within the DCI, and a PUCCH resource composed of thestart timing and PRB allocation information may be jointly coded andsignaled through an individual (ARI) field. To this purpose, first, aPUCCH resource set in which a plurality of PUCCCH resources composed ofa combination of PUCCH start timing and a sequence correspond to therespective ARI values may be configured in advance through an upperlayer signal (for example, an RRC signal).

As one example, the gNB dynamically instructs a UE through a bit fieldwithin DCI to transmit uplink control information such as HARQ-ACK tothe PUCCH, and the UE transmits the PUCCH to the gNB by using a specificresource in a slot indicated for PUCCH transmission. Here, the specificPUCCH resource may indicate a symbol to which a PUCCH is transmittedwithin a slot, a frequency resource, and a sequence resource. The gNBmay combine start timing at which PUCCH transmission is started and aspecific PRB resource within a symbol to define an ARI value; and definean ARI set composed of a plurality of ARI values for each individual UEand preconfigure the ARI set for the UE through an upper layer signal(for example, an RRC signal).

The PRB allocation may include information about how many PRBs to use(contiguously or incontiguously) to transmit a sequence among PRBs(available for PUCCH transmission) belonging to a symbol within a slot.If a slot to which a PUCCH is to be transmitted and a symbol to whichthe PUCCH is transmitted within the corresponding slot are jointly codedby a single field within DCI, the UE may interpret a slot index and atransmission starting symbol mapped to a value indicated by a methodagreed on beforehand with the gNB or a predefined look-up table.

The [Proposed method #5] may be applied together with other proposedmethods of the present disclosure to the extent that the method #5 doesnot collide with the other methods.

When the [Proposed method #4 and #5] are put together in a table, theymay be summarized as shown in Table 5. Table 5 summarizes a method forallocating resources with respect to a short PUCCH which transmits UCIexceeding 2 bits and which is composed of 1 symbol, namely, the proposedmethod #4 and #5.

TABLE 5 Starting symbol Slot position: A position: B ARI ProposedIndicated by Indicated PRB allocation Both method #4 DCI by DCI A and Bmay be indicated together Proposed Indicated by Included PRB allocation,method #5 DCI in ARI starting symbol position

[Proposed method #6] Method for allocating and indicating a 2-symbolshort PUCCH

If it is difficult to satisfy target coverage by using a short PUCCHcomposed of 1-symbol (1-symbol short PUCCH), a UE may use an additionalUL symbol to transmit a short PUCCH composed of 2-symbol. Resources fortransmission of a short PUCCH composed of 2-symbol (2-symbol shortPUCCH) also differ according to the payload size of UCI as describedabove. The short PUCCH composed of 2-symbol may have a form in which astructure such as the short PUCCH composed of 1-symbol is repeated twicein the time domain when the HARQ-ACK payload size of UCI amounts to upto 2 bits, or when the HARQ-ACK payload size of UCI is more than 2 bits,a structure performing FDM of coded UCI bits and RS is applied to the2-symbol.

The proposed method above may be extended for a method for allocatingand indicating resources of the short PUCCH composed of 2-symbol. Morespecifically, when the maximum HARQ-ACK payload size of the UCI is 2bits, [Proposed method #2] or [Proposed method #3] may be applied while,if the HARQ-ACK payload size of UCI is more than 2 bits, the [Proposedmethod #4] or [Proposed method #5] may be applied. It should be noted,however, that in the case of 1-symbol short PUCCH, an arbitrary symbolconfigured as a region allowed for UL transmission may become startingposition, but in the case of 2-symbol PUCCH, at least the last symbolwithin a slot is not allowed to become a transmission starting symbol.

The [Proposed method #6] may be applied together with other proposedmethods of the present disclosure to the extent that the method #6 doesnot collide with the other methods.

<Method for Allocating Resources when the PUCCH Format is Dynamic andMethod for Allocating Resources of a Multi-Slot Long PUCCH>

Table 6 and Table 7 below summarize methods for allocating resources ofa long PUCCH according to the size of HARQ-ACK information bits in asingle slot.

More specifically, Table 6 summarizes a method for allocating resourcesof a long PUCCH that transmits UCI of up to 2 bits.

TABLE 6 Starting Slot symbol Number of position: A position: B symbols:C ARI (D) Option Indicated by Indicated by Indicated by PRB B and C 1DCI DCI DCI allocation, may be OCC, CS indicated together OptionIndicated by Indicated by Configured PRB A and B 2 DCI DCI by RRCallocation, maybe OCC, CS indicated together Option Indicated byIndicated by Included in PRB A and B 3 DCI DCI ARI allocation, may beOCC, CS, indicated number of together symbols Option Indicated byIncluded in Included in PRB 4 DCI ARI ARI allocation, OCC, CS, startingsymbol position, number of symbols

Table 7 summarizes a method for allocating resources for a long PUCCHwhich is incapable of multiplexing and transmits UCI exceeding 2-bits.

TABLE 7 Starting Slot symbol Number of position: A position: B symbols:C ARI (D) Option Indicated Indicated Indicated PRB B and C 1 by DCI byDCI by DCI allocation may be indicated together Option IndicatedIndicated by Configured PRB A and B 2 by DCI DCI by RRC allocation maybe indicated together Option Indicated Indicated by Included in PRB Aand B 3 by DCI DCI ARI allocation, may be number of indicated symbolstogether Option Indicated Included in Include in PRB 4 by DCI ARI ARIallocation, starting symbol position, number of symbols

[Proposed method #7] Method for indicating transmission duration (numberof transmission symbols) of a long PUCCH

When transmission duration of a long PUCCH within a single slot isindicated to a UE, 4-symbol up to 14-symbol may be transmitted;therefore, a maximum of 4 bits are needed to dynamically indicate all ofthe possible transmission durations. Therefore, rather than dynamicallyindicate all the transmission durations, it may be desirable toconfigure a few of specific transmission durations semi-statically for aUE by using an upper layer signal such as an RRC signal and then todynamically indicate one of the transmission durations through DCI.

As one example, if a UE is configured semi-statically with a total offour typical transmission durations 5-symbol, 8-symbol, 11-symbol, and14-symbol through an RRC signal, one of the four transmission durationsmay be dynamically indicated to the UE by using 2 bits within DCI.

The [Proposed method #7] may be applied together with other proposedmethods of the present disclosure to the extent that the method #7 doesnot collide with the other methods.

[Proposed method #8] Method for allocating and indicating resources whenthe PUCCH format is dynamic

If Tables 6 and 7 are further generalized so that transmission durationof a PUCCH is dynamically indicated through number of symbol fieldwithin the DCI, the PUCCH format may be determined implicitly as in the[Proposed method #1] depending on the indicated transmission duration,and resources suitable for the corresponding PUCCH format may beallocated and indicated.

As one example, if transmission duration indicated by DCI is 1-symbol or2-symbol, the PUCCH format indicated by the corresponding DCI is a shortPUCCH, and if HARQ-ACK information requires up to 2 bits according tothe payload size of UCI, the ARI value of Table 6 may be interpreted asa combination of a PRB resource and a sequence corresponding to ACK orNACK as in the [Proposed method #2] (refer to Table 4).

As one example, if transmission duration indicated by DCI is 4-symbol ormore, the PUCCH format indicated by the corresponding DCI is a longPUCCH, and if HARQ-ACK information is more than 2 bits according to thesize of UCI payload, it may be interpreted to be PRB allocation asindicated by the ARI value of Table 7.

The [Proposed method #8] may be applied together with other proposedmethods of the present disclosure to the extent that the method #8 doesnot collide with the other methods.

In what follows, a method for allocating and indicating resources when along PUCCH is transmitted over multiple slots will be described. In thesame way for a short PUCCH composed of 2-symbol described above, if itis difficult to satisfy target coverage by using a long PUCCHtransmitted from a single slot, one or more slots may transmit the longPUCCH repeatedly.

In addition to the elements that have to be allocated and indicated totransmit a long PUCCH in a single slot, additional information may beneeded to transmit a long PUCCH over multiple slots. For example, thenumber of UL symbols required for a UE to satisfy target coverage andtransmission starting position and transmission duration of the longPUCCH in the individual slots constituting the multi-slot may have to beindicated or configured.

Also, since the region allowed for UL transmission varies for each slotin a dynamic TDD operation, multi-slot transmission may not be performedthrough contiguous slots. Therefore, spacing between individual slotsconstituting the multi-slot and a frequency hopping pattern betweenslots to obtain a frequency diversity gain may also have to be indicatedto or configured for a UE.

[Proposed method #9] A UE may have been configured semi-statically withthe following parameters through an upper layer signal (for example, anRRC signal) by a gNB.

1. The number of symbols X required to satisfy target coverage, 2. thenumber of symbols Y of a long PUCCH transmitted in each slot (where Y isa natural number such that 4≤Y≤14), 3. starting position at whichtransmission of a long PUCCH is started within each slot, 4. spacingbetween slots (unit: slot).

FIG. 13 illustrates parameters configured for a UE by a gNB.

Referring to FIG. 13, a long PUCCH may be transmitted through Y symbolswithin a slot. At this time, the Y value may be configured by the gNB.Also, the long PUCCH may be transmitted over multiple slots. FIG. 13illustrates a case where a long PUCCH is transmitted in two slots (131,132), the slot spacing of which is 2. It should be noted that theexample is intended only to help understanding and does not limit thepresent disclosure.

In FIG. 13, the ‘3. Starting position at which transmission of a longPUCCH is started within each slot’ is orthogonal frequency divisionmultiplexing (OFDM) symbol 4, and the ‘4. Spacing between slots’ is 2.

Among the parameters configured by the gNB, the UE may calculate thetotal number of aggregated slots required for transmission based on thenumber of symbols X required to satisfy target coverage and the numberof symbols Y of a long PUCCH transmitted in each slot. For example, thetotal number of aggregated slots may be calculated by using ceil(X/Y).ceil(N) returns the smallest integer among integers larger than N.

Also, before being reconfigured by the gNB, the UE may transmit amulti-slot long PUCCH based on the number of symbols of the long PUCCHand slot spacing configured at the transmission starting position wherethe UE is regularly configured within each slot whenever the multi-slotlong PUCCH transmission is instructed.

Here, the slot spacing may be configured to be the same between slots,or a slot to which the long PUCCH is to be transmitted may be configuredthrough an RRC signal by using one of a plurality of predetermined timepatterns or a bitmap format. Also, to obtain the frequency diversitygain, one of a plurality of frequency hopping patterns may be configuredby an upper layer signal.

As one example, when X=21, Y=5, and transmission starting position andslot spacing are configured to be 4 and 2, respectively, the UE maycalculate the number of aggregated slots required as ceil(21/5)=5. Andeach time multi-slot long PUCCH transmission is instructed, the UE maytransmit a long PUCCH through 5 symbols starting from the fourth symbolwithin a slot and transmit the long PUCCH repeatedly through 5contiguous slots separated by 2 slots from the others.

The [Proposed method #9] may be applied together with other proposedmethods of the present disclosure to the extent that the method #9 doesnot collide with the other methods.

[Proposed method #10] A UE may be configured with the followingparameters by a gNB semi-statically through an upper layer signal (forexample, an RRC signal) or dynamically through DCI.

1. The number of symbols X required to satisfy target coverage, 2. thenumber of symbols Y of a long PUCCH transmitted in each slot (where Y isa natural number such that 4≤Y≤14), 3. starting position at whichtransmission of a long PUCCH is started within each slot, 4. spacingbetween slots (unit: slot).

Among the parameters, the number of symbols X required to satisfy targetcoverage, the number of symbols Y of a long PUCCH transmitted in eachslot, and starting position at which transmission of a long PUCCH isstarted within each slot may be configured semi-statically by an upperlayer signal such as an RRC signal; and spacing between slots may beindicated dynamically through DCI.

Among the parameters configured by the gNB, the UE may calculate thetotal number of aggregated slots required for transmission based on thenumber of symbols X required to satisfy target coverage and the numberof symbols Y of a long PUCCH transmitted in each slot by usingceil(X/Y), for example.

Before being reconfigured by the gNB, the UE may transmit a long PUCCHat the transmission starting position where the UE is regularlyconfigured within each slot whenever the multi-slot long PUCCHtransmission is instructed. Spacing between slots constituting themulti-slot long PUCCH may vary according to slot spacing indicateddynamically within DCI that triggers the multi-slot long PUCCHtransmission.

Here, the slot spacing may be configured to be the same between slots,or a slot to which the long PUCCH is to be transmitted may be indicatedthrough DCI or a bitmap format while a plurality of predetermined timepatterns are configured in advance.

Also, to obtain the frequency diversity gain, one of a plurality offrequency hopping patterns may be configured by an upper layer signal.Also, through DCI instructing multi-slot long PUCCH transmission,spacing between slots constituting the multi-slot long PUCCH may beindicated dynamically.

As one example, when X=21, Y=5, transmission starting position isconfigured to be 4, and DCI instructing multi-slot long PUCCHtransmission indicates the slot spacing to be 2, the UE may calculatethe number of aggregated slots required as ceil(21/5)=5. Each timemulti-slot long PUCCH transmission is instructed, the UE may transmit along PUCCH through 5 symbols starting from the fourth symbol within aslot and transmit the long PUCCH through the 5 contiguous slotsseparated by 2 slots from the others. If DCI instructing the nextmulti-slot long PUCCH transmission indicates the slot spacing to be 4,the long PUCCH may still be transmitted at the same starting positionthrough the same number of symbols based on the aforementioned number ofaggregated slots, but the long PUCCH may be transmitted through 5contiguous slots separated by 4 slots from the others.

The [Proposed method #10] may be applied together with other proposedmethods of the present disclosure to the extent that the method #10 doesnot collide with the other methods.

[Proposed method #11] A UE may be configured with the followingparameters by a gNB semi-statically through an upper layer signal (forexample, an RRC signal) or dynamically through DCI.

1. The number of symbols X required to satisfy target coverage, 2. thenumber of symbols Y of a long PUCCH transmitted in each slot (where Y isa natural number such that 4≤Y≤14), 3. starting position at whichtransmission of a long PUCCH is started within each slot, 4. spacingbetween slots (unit: slot).

Among the parameters, the number of symbols X required to satisfy targetcoverage, the number of symbols Y of a long PUCCH transmitted in eachslot, and spacing of slots constituting a multi-slot long PUCCH may beconfigured semi-statically by an upper layer signal such as an RRCsignal; and the starting position at which transmission of a long PUCCHis started within each slot may be indicated through an individual DCIfield or jointly coded to be dynamically indicated by a single field.

Among the parameters configured by the gNB, the UE may calculate thetotal number of aggregated slots required for transmission based on thenumber of symbols X required to satisfy target coverage and the numberof symbols Y of a long PUCCH transmitted in each slot by usingceil(X/Y), for example.

The number of symbols X required to satisfy target coverage and spacingbetween slots constituting a multi-slot long PUCCH always use the sameconfigured values until they are reconfigured by a gNB; and transmissionstarting position of a long PUCCH may be changed to a symbol positionindicated by the corresponding DCI each time multi-slot long PUCCHtransmission is indicated. Also, DCI instructing multi-slot long PUCCHtransmission may dynamically indicate the starting position of a longPUCCH in each slot constituting the multi-slot long PUCCH.

The slot spacing may be configured to be the same between slots, or aslot to which the long PUCCH is to be transmitted may be configured byusing an RRC signal according to one of a plurality of predeterminedtime patterns or a bitmap format. Also, to obtain the frequencydiversity gain, one of a plurality of frequency hopping patterns may beconfigured by an upper layer signal.

As one example, when X=21, Y=5, transmission starting position isconfigured to be 2, transmission starting position is configured to be4, and DCI indicating a multi-slot long PUCCH indicates the startingposition to be 4, the UE may calculate the number of aggregated slotsrequired as ceil(21/5)=5; and if multi-slot long PUCCH transmission isinstructed, the UE may transmit a long PUCCH through 5 symbols startingfrom the fourth symbol within slots separated by 2 slots from theothers. If DCI indicating the next multi-slot long PUCCH indicates thestarting position to be 5, the long PUCCH may be transmitted by usingthe 5th symbol as the starting position through 5 contiguous slotsseparated by the same slot spacing from the others in as many as thesame number of symbols based on the aforementioned number of aggregatedslots.

The [Proposed method #11] may be applied together with other proposedmethods of the present disclosure to the extent that the method #11 doesnot collide with the other methods.

[Proposed method #12] A UE may be configured with the followingparameters by a gNB semi-statically through an upper layer signal (forexample, an RRC signal) or dynamically through DCI.

1. The number of symbols X required to satisfy target coverage, 2. thenumber of symbols Y of a long PUCCH transmitted in each slot (where Y isa natural number such that 4≤Y≤14), 3. starting position at whichtransmission of a long PUCCH is started within each slot, 4. spacingbetween slots (unit: slot).

Among the parameters, the gNB may configure the number of symbols Xrequired to satisfy target coverage and the number of symbols Y of along PUCCH transmitted in each slot semi-statically by using an upperlayer signal such as an RRC signal; and spacing of slots constituting amulti-slot long PUCCH and the starting position at which transmission ofa long PUCCH is started within each slot may be indicated through anindividual DCI field or jointly coded to be dynamically indicated by asingle field.

Among the parameters configured by the gNB, the UE may calculate thetotal number of aggregated slots required for transmission based on thenumber of symbols X required to satisfy target coverage and the numberof symbols Y of a long PUCCH transmitted in each slot by usingceil(X/Y), for example.

The number of symbols X required to satisfy target coverage and spacingbetween slots constituting a multi-slot long PUCCH always use the sameconfigured values until they are reconfigured by a gNB; and transmissionstarting position of a long PUCCH may be changed to a symbol positionindicated by the corresponding DCI each time multi-slot long PUCCHtransmission is indicated.

Also, within DCI indicating a multi-slot long PUCCH, the startingposition and spacing of a long PUCCH in each slot constituting themulti-slot long PUCCH may be dynamically indicated. Also, when theparameter 3 and 4 among the parameters above are jointly coded to beindicated by one DCI field, a plurality of combinations of the parameter3 and 4 may be configured by an upper layer signal in advance, and oneof the combinations may be indicated by DCI.

The slot spacing may be configured to be the same between slots, or aslot to which the long PUCCH is to be transmitted may be indicatedthrough DCI or a bitmap format while a plurality of predetermined timepatterns are configured in advance. Also, to obtain the frequencydiversity gain, one of a plurality of frequency hopping patterns may beconfigured by an upper layer signal.

As one example, if X=21, Y=5, and DCI indicating a multi-slot long PUCCHindicates the transmission starting position and slot space to be 4 and2, respectively, the UE may calculate the required number of aggregatedslots as ceil(21/5)=5 and if multi-slot long PUCCH transmission isinstructed, transmits a long PUCCH through 5 symbols starting from thefourth symbol within 5 slots separated by 2 slots from the other slots.If DCI indicating the next multi-slot long PUCCH indicates the startingposition to be 5 and slot spacing to be 1, the long PUCCH may betransmitted by using the 5th symbol as the starting position within eachof 5 slots separated by 1 slot spacing from the others in as many as 5symbols based on the aforementioned number of aggregated slots.

The [Proposed method #12] may be applied together with other proposedmethods of the present disclosure to the extent that the method #12 doesnot collide with the other methods.

[Proposed method #13] A UE may be configured with the followingparameters by a gNB semi-statically through an upper layer signal (forexample, an RRC signal) or dynamically through DCI.

1. The number of symbols X required to satisfy target coverage, 2. thenumber of symbols Y of a long PUCCH transmitted in each slot (where Y isa natural number such that 4≤Y≤14), 3. starting position at whichtransmission of a long PUCCH is started within each slot, 4. spacingbetween slots (unit: slot).

Among the parameters, the number of symbols X required to satisfy targetcoverage, spacing of slots constituting a multi-slot long PUCCH, and thestarting position at which transmission of a long PUCCH is startedwithin each slot may be indicated semi-statically by using an upperlayer signal such as an RRC signal; and the number of symbols Y of along PUCCH transmitted in each slot may be indicated dynamically throughDCI.

Among the parameters configured by the gNB, the UE may calculate thetotal number of aggregated slots required for transmission based on thenumber of symbols X required to satisfy target coverage and the numberof symbols Y of a long PUCCH transmitted in each slot, which isindicated by DCI indicating a multi-slot long PUCCH, by using ceil(X/Y),for example.

The number of symbols X required to satisfy target coverage, spacingbetween slots constituting a multi-slot long PUCCH, and transmissionstarting position of a long PUCCH may use the same configured valuesuntil they are reconfigured by a gNB. The number of symbols of a longPUCCH within each slot may be indicated through DCI and transmitteddifferently for each multi-slot long PUCCH. Also, DCI indicating amulti-slot long PUCCH may dynamically indicate the number of symbols ofa long PUCCH in each slot constituting the multi-slot long PUCCH.

The slot spacing may be configured to be the same between slots, or aslot to which the long PUCCH is to be transmitted may be configured byusing an RRC signal according to one of a plurality of predeterminedtime patterns or a bitmap format. Also, to obtain the frequencydiversity gain, one of a plurality of frequency hopping patterns may beconfigured by an upper layer signal.

As one example, when X=21, transmission starting position and slotspacing are configured to be 4 and 2, respectively, and DCI indicating amulti-slot long PUCCH indicates the number of symbols transmitted ineach slot to be Y=5, the UE may calculate the number of aggregated slotsrequired as ceil(21/5)=5. If multi-slot long PUCCH transmission isinstructed by DCI, a long PUCCH is transmitted through 5 symbolsstarting from the fourth symbol in each of 5 slots separated by 2 slotsfrom the others. If DCI indicating the next multi-slot long PUCCHindicates the number of symbols transmitted in each slot to be Y=7, theUE may calculate the number of aggregated slots required as ceil(21/7)=3and transmits a long PUCCH having a length of 7 symbols through 3 slotsby using the transmission starting position and slot spacing configuredthe same as the example above.

The [Proposed method #13] may be applied together with other proposedmethods of the present disclosure to the extent that the method #13 doesnot collide with the other methods.

[Proposed method #14] A UE may be configured with the followingparameters by a gNB semi-statically through an upper layer signal (forexample, an RRC signal) or dynamically through DCI.

1. The number of symbols X required to satisfy target coverage, 2. thenumber of symbols Y of a long PUCCH transmitted in each slot (where Y isa natural number such that 4≤Y≤14), 3. starting position at whichtransmission of a long PUCCH is started within each slot, 4. spacingbetween slots (unit: slot).

Among the parameters, the number of symbols X required to satisfy targetcoverage and the starting position at which transmission of a long PUCCHis started within each slot constituting a multi-slot long PUCCH may beconfigured semi-statically by using an upper layer signal such as an RRCsignal; and the number of symbols Y of a long PUCCH transmitted in eachslot and slot spacing may be indicated through individual fields withinDCI or jointly coded to be dynamically indicated through a single field.

Among the parameters configured by the gNB, the UE may calculate thetotal number of aggregated slots required for transmission based on thenumber of symbols X required to satisfy target coverage and the numberof symbols Y of a long PUCCH transmitted in each slot, which isindicated by DCI indicating a multi-slot long PUCCH, by using ceil(X/Y),for example.

The number of symbols X required to satisfy target coverage andtransmission starting position of a long PUCCH within each slotconstituting a multi-slot long PUCCH may use the same configured valuesuntil they are reconfigured by a gNB; and slot spacing may be indicatedthrough DCI and transmitted differently for each multi-slot long PUCCH.

Also, DCI indicating a multi-slot long PUCCH may dynamically indicatethe number of symbols of a long PUCCH in each slot constituting themulti-slot long PUCCH and slot spacing. And when the parameter 2 and 4are jointly coded to be indicated by one DCI field, a plurality ofcombinations of the parameter 2 and 4 may be configured by an upperlayer signal in advance, and one of the combinations may be indicated byDCI.

The slot spacing may be configured to be the same between slots, or aslot to which the long PUCCH is to be transmitted may be indicatedthrough DCI or a bitmap format while a plurality of predetermined timepatterns are configured in advance. Also, to obtain the frequencydiversity gain, one of a plurality of frequency hopping patterns may beconfigured by an upper layer signal.

As one example, when X=21, transmission starting position is configuredto be 4, DCI indicating a multi-slot long PUCCH indicates the number ofsymbols transmitted in each slot to be Y=5, and spacing between slots isindicated to be 2, the UE may calculate the number of aggregated slotsrequired as ceil(21/5)=5. And if multi-slot long PUCCH transmission isinstructed by DCI, a long PUCCH is transmitted through 5 symbolsstarting from the fourth symbol in each of 5 slots separated by 2 slotsfrom the others. If DCI indicating the next multi-slot long PUCCHindicates the number of symbols transmitted in each slot to be Y=7 andspacing between slots to be 1-slot, the UE may calculate the number ofaggregated slots required as ceil(21/7)=3 and transmits a long PUCCHhaving a length of 7 symbols through 3 slots separated by 1-slot spacingfrom the others by using the transmission starting position configuredthe same as the example above.

The [Proposed method #14] may be applied together with other proposedmethods of the present disclosure to the extent that the method #14 doesnot collide with the other methods.

[Proposed method #15] A UE may be configured with the followingparameters by a gNB semi-statically through an upper layer signal (forexample, an RRC signal) or dynamically through DCI.

1. The number of symbols X required to satisfy target coverage, 2. thenumber of symbols Y of a long PUCCH transmitted in each slot (where Y isa natural number such that 4≤Y≤14), 3. starting position at whichtransmission of a long PUCCH is started within each slot, 4. spacingbetween slots (unit: slot).

Among the parameters, the number of symbols X required to satisfy targetcoverage and spacing between slots constituting a multi-slot long PUCCHmay be configured semi-statically by using an upper layer signal such asan RRC signal; and starting position at which transmission of a longPUCCH is started within each slot constituting the multi-slot long PUCCHand the number of symbols Y of the long PUCCH transmitted in each slotmay be indicated through individual fields within DCI or jointly codedto be dynamically indicated through a single field.

Among the parameters configured by the gNB, the UE may calculate thetotal number of aggregated slots required for transmission based on thenumber of symbols X required to satisfy target coverage and the numberof symbols Y of a long PUCCH transmitted in each slot, which isindicated by DCI indicating a multi-slot long PUCCH, by using ceil(X/Y),for example.

The number of symbols X required to satisfy target coverage and spacingbetween slots constituting a multi-slot long PUCCH may use the sameconfigured values until they are reconfigured by a gNB; and transmissionstarting position of a long PUCCH may be indicated through DCI andtransmitted differently for each multi-slot long PUCCH.

The slot spacing may be configured to be the same between slots, or aslot to which the long PUCCH is to be transmitted may be configured byusing an RRC signal according to one of a plurality of predeterminedtime patterns of a bitmap format. Also, to obtain the frequencydiversity gain, one of a plurality of frequency hopping patterns may beconfigured by an upper layer signal. Also, DCI indicating a multi-slotlong PUCCH may dynamically indicate the number of symbols of a PUCCH ineach slot constituting the multi-slot long PUCCH and starting position.And when the parameter 2 and 3 are jointly coded to be indicated by oneDCI field, a plurality of combinations of the parameter 2 and 3 may beconfigured by an upper layer signal in advance, and one of thecombinations may be indicated by DCI.

As one example, when X=21, spacing between slots is configured to be 2,and DCI indicating a multi-slot long PUCCH indicates the number ofsymbols transmitted in each slot to be Y=5 and transmission startingposition of a long PUCCH within each slot to be 4, the UE may calculatethe number of aggregated slots required as ceil(21/5)=5; if multi-slotlong PUCCH transmission is instructed by DCI, a long PUCCH istransmitted through 5 symbols starting from the fourth symbol in each of5 slots separated by 2 slots from the others. If DCI indicating the nextmulti-slot long PUCCH indicates the number of symbols transmitted ineach slot to be Y=7 and transmission starting position in each slot tobe 5, the UE may calculate the number of aggregated slots required asceil(21/7)=3 and transmits a long PUCCH having a length of 7 symbolsstarting from the fifth symbol position in each of 3 slots separatedfrom the others by using the slot spacing configured the same as theexample above.

The [Proposed method #15] may be applied together with other proposedmethods of the present disclosure to the extent that the method #15 doesnot collide with the other methods.

[Proposed method #16] A UE may be configured with the followingparameters by a gNB semi-statically through an upper layer signal (forexample, an RRC signal) or dynamically through DCI.

1. The number of symbols X required to satisfy target coverage, 2. thenumber of symbols Y of a long PUCCH transmitted in each slot (where Y isa natural number such that 4≤Y≤14), 3. starting position at whichtransmission of a long PUCCH is started within each slot, 4. spacingbetween slots (unit: slot).

Among the parameters, the number of symbols X required to satisfy targetcoverage may be configured semi-statically by using an upper layersignal such as an RRC signal; and spacing between slots constituting amulti-slot long PUCCH, starting position at which transmission of a longPUCCH is started within each slot, and the number of symbols Y of thelong PUCCH transmitted in each slot may be indicated through individualfields within DCI or jointly coded to be dynamically indicated through asingle field.

Among the parameters configured by the gNB, the UE may calculate thetotal number of aggregated slots required for transmission based on thenumber of symbols X required to satisfy target coverage and the numberof symbols Y of a long PUCCH transmitted in each slot, which isindicated by DCI indicating a multi-slot long PUCCH, by using ceil(X/Y),for example.

The number of symbols X required to satisfy target coverage may use thesame configured values until they are reconfigured by a gNB; andtransmission starting position of a long PUCCH, spacing between slots,and the number of symbols of the long PUCCH within each slot may beindicated through DCI and transmitted differently for each multi-slotlong PUCCH.

The slot spacing may be configured to be the same between slots, or aslot to which the long PUCCH is to be transmitted may be indicatedthrough DCI or a bitmap format while a plurality of predetermined timepatterns are configured in advance. Also, to obtain the frequencydiversity gain, one of a plurality of frequency hopping patterns may beconfigured by an upper layer signal.

Also, DCI indicating a multi-slot long PUCCH may dynamically indicatethe number of symbols of a long PUCCH in each slot constituting themulti-slot long PUCCH and starting position. And when the parameter 2,3, and 4 are jointly coded to be indicated by one DCI field, a pluralityof combinations of the parameter 2, 3, and 4 may be configured by anupper layer signal in advance, and one of the combinations may beindicated by DCI.

As one example, when X=21, and DCI indicating a multi-slot long PUCCHindicates the number of symbols transmitted in each slot to be Y=5,transmission starting position of a long PUCCH within each slot to be 4,and spacing between slots to be 2, the UE may calculate the number ofaggregated slots required as ceil(21/5)=5. And if multi-slot long PUCCHtransmission is instructed by DCI, a long PUCCH is transmitted through 5symbols starting from the fourth symbol in each of 5 slots separated by2 slots from the others.

If DCI indicating the next multi-slot long PUCCH indicates the number ofsymbols transmitted in each slot to be Y=7, transmission startingposition in each slot to be 5, and spacing between slots to be 1-slot,the UE may calculate the number of aggregated slots required asceil(21/7)=3 and transmits a long PUCCH having a length of 7 symbolsstarting from the fifth symbol position in each of 3 slots separated by1-slot spacing from the others.

The [Proposed method #16] may be applied together with other proposedmethods of the present disclosure to the extent that the method #16 doesnot collide with the other methods.

FIG. 14 illustrates a block diagram of a device in which an embodimentof the present disclosure is implemented.

Referring to FIG. 14, the device 100 comprises a processor 110, a memory120, and a transceiver 130. The processor 110 implements proposedfunctions, processes, and/or methods. The memory 120, being connected tothe processor 110, stores various pieces of information for operatingthe processor 110. The transceiver 130, being connected to the processor110, transmits and/or receives radio signals.

The device 100 may be a gNB or a UE.

FIG. 15 illustrates a UE of FIG. 14 in more detail.

Referring to FIG. 15, the UE may comprise a processor (or a digitalsignal processor (DSP)) 1810, RF module (or RF unit) 1835, powermanagement module 1805, antenna 1840, battery 1855, display 1815, keypad1820, memory 1830, Subscriber Identification Module (SIM) card 1825(which is optional), speaker 1845, and microphone 1850. Furthermore, theUE may include a single antenna or multiple antennas.

The processor 1810 implements the functions, processes and/or methodsdescribed with reference to FIGS. 9 to 13. Layers of a wirelessinterface protocol may be implemented by the processor. The memory 1830is connected to the processor and stores information related to theoperation of the processor. The memory 1830 may be installed inside oroutside the processor and may be connected to the processor via variouswell-known means

The user enters command information such as a phone number by pushing(or touching) buttons of the keypad 1820 or voice activation using themicrophone 1850. The processor receives such command information andprocesses the command information to perform an appropriate functionsuch as calling the phone number. Operational data may be extracted fromthe SIM card 1825 or memory 1830. Also, the processor may displaycommand information or operating information on the display 1815 for theuser's attention and convenience.

The RF module 1835, being connected to the processor, transmits and/orreceives an RF signal.

The processor delivers command information to the RF module to initiatecommunication, for example, to transmit a radio signal comprising voicecommunication data. The RF module comprises a receiver and a transmitterto receive and transmit a radio signal. The antenna 1840 performs afunction of transmitting and receiving a radio signal. When receiving aradio signal, the RF module may deliver the signal to be processed bythe processor and convert the signal into the baseband. The processedsignal may be converted to audible signal output through the speaker1845 or readable information.

The processor 110 may include application-specific integrated circuits(ASICs), other chipsets, logic circuits, data processors and/or aconverter mutually converting a baseband signal and a wireless signal.The memory 120 may include read-only memory (ROM), random access memory(RAM), a flash memory, memory cards, storage mediums and/or otherstorage devices. The transceiver 130 may include at least one antennafor transmitting and/or receiving a wireless signal. When an embodimentis implemented by software, the above-described scheme may beimplemented using a module (process or function) which performs theabove function. The module may be stored in the memory 120 and executedby the processor 110. The memory 120 may be disposed within or outsidethe processor 110 and connected to the processor using a variety ofwell-known means.

What is claimed is:
 1. A method for transmitting uplink controlinformation by a User Equipment (UE) in a wireless communication system,the method comprising: receiving a higher layer signal for a pluralityof physical uplink control channel (PUCCH) resources; receiving downlinkcontrol information (DCI); generating the uplink control information;and transmitting the uplink control information, based on the higherlayer signal and the DCI, to a base station using a specific PUCCHformat among a plurality of PUCCH formats, wherein the uplink controlinformation comprises hybrid automatic repeat and request-acknowledge(HARQ-ACK) information, wherein the specific PUCCH format is determinedbased on a number of symbols used for transmission of the uplink controlinformation in a time domain and a number of bits of the uplink controlinformation, wherein the plurality of PUCCH formats comprise: PUCCHformat 0 in which the number of symbols used for transmission of theuplink control information in the time domain is 1 or 2 and the numberof bits of the uplink control information is 1 or 2, PUCCH format 1 inwhich the number of symbols used for transmission of the uplink controlinformation in the time domain is 4 or more and the number of bits ofthe uplink control information is 1 or 2, PUCCH format 2 in which thenumber of symbols used for transmission of the uplink controlinformation in the time domain is 1 or 2, and the number of bits of theuplink control information is more than 2, PUCCH format 3 or PUCCHformat 4 in which the number of symbols used for transmission of theuplink control information in a time domain is 4 or more and the numberof bits of the uplink control information is more than 2, wherein theDCI comprises (i) a PUCCH resource indicator field informing of a PUCCHresource among the plurality of PUCCH resources and (ii) a slot timingindicator field informing of a slot where the specific PUCCH format isto be transmitted, and wherein the specific PUCCH format is transmittedbased on the PUCCH resource informed by the PUCCH resource indicatorfield in the slot informed by the slot timing indicator field.
 2. Themethod of claim 1, wherein each of the plurality of PUCCH resourcescomprises at least one of a parameter related to a first symbol to whicha PUCCH is transmitted, a parameter related to a first physical resourceblock (PRB) to which a PUCCH is transmitted, a parameter related to thenumber of symbols to which a PUCCH is transmitted, a parameter relatedto an orthogonal cover code (OCC), or a parameter related to cyclicshift (CS).
 3. The method of claim 1, further comprising receiving datafrom the base station.
 4. The method of claim 3, wherein the HARQ-ACKinformation is acknowledge/negative-acknowledgement (ACK/NACK) for thedata.
 5. The method of claim 1, wherein the specific PUCCH format istransmitted within a slot comprising 14 symbols in the time domain. 6.The method of claim 1, wherein the PUCCH format 3 does not supportmultiplexing with PUCCH formats transmitted by other UEs.
 7. The methodof claim 1, wherein the PUCCH format 4 supports multiplexing with PUCCHformats transmitted by other UEs.
 8. A user equipment (UE) configured tooperate in a wireless communication system, the UE comprising: atransceiver configured to transmit and receive radio signals; and aprocessor configured to operate in conjunction with the transceiver,wherein the processor is further configured to: receive a higher layersignal for a plurality of physical uplink control channel (PUCCH)resources; receive downlink control information (DCI); generate uplinkcontrol information, and transmit the uplink control information, basedon the higher layer signal and the DCI, to a base station using aspecific PUCCH format among a plurality of PUCCH formats, wherein theuplink control information comprises hybrid automatic repeat andrequest-acknowledge (HARQ-ACK) information, wherein the specific PUCCHformat is determined based on a number of symbols used for transmissionof the uplink control information in a time domain and a number of bitsof the uplink control information, wherein the plurality of PUCCHformats comprise: PUCCH format 0 in which the number of symbols used fortransmission of the uplink control information in the time domain is 1or 2 and the number of bits of the uplink control information is 1 or 2,PUCCH format 1 in which the number of symbols used for transmission ofthe uplink control information in the time domain is 4 or more and thenumber of bits of the uplink control information is 1 or 2, PUCCH format2 in which the number of symbols used for transmission of the uplinkcontrol information in the time domain is 1 or 2, and the number of bitsof the uplink control information is more than 2, PUCCH format 3 orPUCCH format 4 in which the number of symbols used for transmission ofthe uplink control information in a time domain is 4 or more and thenumber of bits of the uplink control information is more than 2, whereinthe DCI comprises (i) a PUCCH resource indicator field informing of aPUCCH resource among the plurality of PUCCH resources and (ii) a slottiming indicator field informing of a slot where the specific PUCCHformat is to be transmitted, and wherein the specific PUCCH format istransmitted based on the PUCCH resource informed by the PUCCH resourceindicator field in the slot informed by the slot timing indicator field.